The former A860 (now B896) on the east coast of Great Cumbrae
There were no classified roads on Great Cumbrae in the Firth of Clyde in the original 1922 classification. However, this was quickly remedied and the first new Class I number to be allocated, possibly as early as 1923, was the A860 for the island's 'ring road'. The road mostly ran along the shore of Great Cumbrae, almost always the nearest road to the coast, thus connecting Millport, the island's capital and only sizeable settlement, to the rest of Great Cumbrae. The only other classified road, the B899, was met in Millport and again at Downcraig near the ferry crossing on the east coast.
Although the A860 was still in existence in the 1970s, and marked on the 1980 OS Landranger sheet, it has since been downgraded and is now numbered as the B896.